Pointing to an allocentric and egocentric remembered target.

@article{citeulike:615609, abstract = {Pointing to a visual target that disappears prior to movement requires the maintenance of a memory representation about the location of the target. It has been shown that a target can be stored egocentrically, allocentrically, or in both frames of reference simultaneously. The main goal of the present study was to compare the accuracy and kinematics of a pointing movement to a remembered target when egocentric, allocentric, or combined egocentric and allocentric coding was possible. The task was to localize, memorize, and reach to a remembered target. Condition 1 was the "no-context" condition and involved presenting the target in a completely dark environment (egocentric condition). For 2 other conditions, the target was presented within a visual context provided by an illuminated square. Condition 2 was the "stationary-context" condition and involved keeping the context at the same position during the whole trial (egocentric and/or allocentric coding). Condition 3 was a "moved-context" condition that involved shifting the context to a different location during the recall delay (allocentric coding). Movement accuracy and kinematics results were strikingly similar for the moved-context and stationary-context conditions. These results suggest that when both allocentric and egocentric coding are possible, an allocentric strategy is used.}, address = {Motor Control Laboratory, Arizona State University, Tempe, AZ 85287-0404, USA.}, author = {Lemay, M. and Bertram, C. P. and Stelmach, G. E. }, citeulike-article-id = {615609}, issn = {1087-1640}, journal = {Motor Control}, keywords = {egoallo, reachgrasp, remap, spatial, wm}, month = {January}, number = {1}, pages = {16--32}, posted-at = {2006-05-06 00:12:23}, priority = {4}, title = {Pointing to an allocentric and egocentric remembered target.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/14973335}, volume = {8}, year = {2004} }

TY - JOUR ID - citeulike:615609 L3 - citeulike-article-id:615609 TI - Pointing to an allocentric and egocentric remembered target. JF - Motor Control VL - 8 IS - 1 SP - 16 EP - 32 AD - Motor Control Laboratory, Arizona State University, Tempe, AZ 85287-0404, USA. SN - 1087-1640 N2 - Pointing to a visual target that disappears prior to movement requires the maintenance of a memory representation about the location of the target. It has been shown that a target can be stored egocentrically, allocentrically, or in both frames of reference simultaneously. The main goal of the present study was to compare the accuracy and kinematics of a pointing movement to a remembered target when egocentric, allocentric, or combined egocentric and allocentric coding was possible. The task was to localize, memorize, and reach to a remembered target. Condition 1 was the "no-context" condition and involved presenting the target in a completely dark environment (egocentric condition). For 2 other conditions, the target was presented within a visual context provided by an illuminated square. Condition 2 was the "stationary-context" condition and involved keeping the context at the same position during the whole trial (egocentric and/or allocentric coding). Condition 3 was a "moved-context" condition that involved shifting the context to a different location during the recall delay (allocentric coding). Movement accuracy and kinematics results were strikingly similar for the moved-context and stationary-context conditions. These results suggest that when both allocentric and egocentric coding are possible, an allocentric strategy is used. KW - egoallo KW - reachgrasp KW - remap KW - spatial KW - wm AU - Lemay, M AU - Bertram, CP AU - Stelmach, GE PY - 2004/01// UR - http://view.ncbi.nlm.nih.gov/pubmed/14973335 ER -